Alexa Fluor 680 dye

Invitrogen Alexa Fluor 680 dye is a bright, near-IR fluorescent dye with excitation ideally suited for the 633 nm laser line. For stable signal generation in imaging and flow cytometry, Alexa Fluor 680 dye is pH-insensitive over a wide molar range.

The fluorescence quantum yield and high photostability in antifade allow detection of low-abundance biological structures in fixed cells with great sensitivity. Alexa Fluor 680 dye molecules can be attached to proteins at high molar ratios without significant self-quenching, leading to brighter conjugates and more sensitive detection. The long wavelength emission allows for detection in complex samples with auto-fluorescent background signals.

We offer Alexa Fluor 680 dye conjugated to a variety of antibodies, peptides, proteins, tracers, and amplification substrates optimized for cellular labeling and detection. In addition, reactive dye forms and protein labeling kits are available to allow you to generate your own antibody conjugates or probes.

Alexa Fluor 680 dye dashboard

Initial brightness		Near IR dye provides signal in a spectral range easily separated from tissue autofluorescence. Useful for multiplexing western blot detection. In addition, useful in stochastic optical reconstruction microscopy (STORM) where it is used a reporter for dSTORM.
Photostability in buffer
Photostability in antifade
Performance in SRM

---

	633	Cy5.5	679	702
	Laser line	Common filter set	Excitation max	Emission max

Select dye-labeling chemistries for conjugation with the following reactive groups: 

Select an optimized labeling kit for your target antibody or protein: